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      // o(n*2)
      function bubbleSort(arr) {
        for (let i = 0; i < arr.length - 1; i++) {
          for (let j = 0; j < arr.length - 1 - i; j++) {
            if (arr[j] > arr[j + 1]) {
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              arr[j] = arr[j + 1];
              arr[j + 1] = temp;
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      console.log(bubbleSort([1, 4, 5, 7, 8, 9, 6, 100, 99]));
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